About the BLAKE2b Hash Generator
BLAKE2b is a fast, secure hash optimised for 64-bit platforms, producing up to 512 bits. It is faster than MD5 and SHA-2 in software yet has a strong security margin, which is why it is used in Argon2, WireGuard, many package managers and content-addressed stores. This tool computes the default 512-bit output locally from your text.
BLAKE2b buys its speed by cutting rounds from BLAKE, a SHA-3 finalist that had a generous margin to spare, and by dropping padding machinery a hash only needs in particular constructions. It has a keyed mode built into the algorithm, so an authenticated digest needs no HMAC wrapper around it, and a personalisation parameter that lets two applications derive different digests from identical input without either one having to salt by hand.
Output length is a parameter rather than a fixed property, and it is folded into the initial state before any message bytes are read. The practical consequence is that a 256-bit BLAKE2b digest is not the first half of a 512-bit one: asking for a shorter output produces an entirely different value. Code that truncates a long digest instead of requesting the length it wants will fail to interoperate with anything, and the bug is invisible until something on the other side checks. It resists the attacks that broke MD5 and SHA-1 and has no known practical weaknesses. Being fast, it is a hashing and checksum algorithm rather than a password-storage one; for passwords use Argon2, which uses BLAKE2b internally but adds deliberate slowness. Output is hex or Base64.
How to use
- Paste text.
- Choose the output format.
- Copy the BLAKE2b hash.
Common questions
- Is BLAKE2b faster than SHA-256?
- Yes, usually significantly, especially on 64-bit CPUs, while staying secure.
- Where is it used?
- In Argon2, WireGuard, checksums and content-addressed storage systems.
- BLAKE2b or BLAKE2s?
- BLAKE2b is tuned for 64-bit platforms; BLAKE2s for 8 to 32-bit. Use 2b on servers and desktops.